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Thread: Retrofit PWM to Throttle

  1. #31
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    Thumbs up More progress..

    I've got a rev 1 PCB designed now and am working on the case. This will be a pretty darn rigid one and I made sure to include some pretty large wire pads (up to 10 AWG) and did a partial override to the thermal reliefs on the source and drain traces in order to achieve less resistance. Boards should be here soon and I will go over details.

    Here is the main thread I am starting over at HODInfo:

    http://hodinfo.com/forum/topics/smar...bd-ii-vehicles
    Last edited by Stevo; 06-30-2013 at 09:20 PM. Reason: Add HODinfo link

  2. #32
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    Default

    I completed the bench test against the reactor @12A. Unit ran at room temperature and very smoothly at 173Hz from 0-100% duty cycle. I need to finish my stainless bubbler then it's install time.

  3. Default pwm to throttle

    Good work guys you've helped me no end as it was a problem i have as i know i need some way of controling hho input over the rev range as not to over lean mixture i know i have to use evoscan to tune fuel maps but could not see how i could contol hho but will be intrested in seeing how this pans out
    stevo would you be willing to build one of these of others namely me lol ?
    Last edited by Vr4-NIGEL; 08-04-2013 at 09:04 PM.

  4. #34
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    Quote Originally Posted by Vr4-NIGEL View Post
    would you be willing to build one of these of others namely me lol ?
    I will be posting this as a kit some time within the next 8 - 12 weeks (depending on my work schedule). The current model is getting a big upgrade with current sensing and ability to handle 60A without getting any larger. Stay tuned..

  5. Default

    Cool will keep an eye on here then i think what you have done will help me control the hho that my engine receives at anytime giving me more peace of mind

  6. #36
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    Should also help provide better average results as running a reactor at 10 or more amp draw at idle (when there is little or no load on the engine) is not going to save you anything.

  7. #37
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    Added a current carrier for detecting amp draw, wrote a simple test to limit current to 12.5 amps and threw in a cheap Radioshack project box.

    http://hodinfo.com/forum/topics/smar...ource=activity


  8. #38
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    I found some time to get this completed (minus the display). I have successfully retrofitted the PWM to the throttle signal plus mapped RPM and engine load. Lots of other things I could map it to as well. The best thing about this setup is it turns off 100% reliably at a stop while idling. I'm in the middle of a mileage tainted tank right now (lots of idling with the system on for different tests), but will begin with an ECU reset and full tank of gas. I expect 20-30% range increase while commuting similar to what I realized in my previous car of the same earlier model.

    Sorry about linking to the thread instead of posting here. This site doesn't provide the writing features I need yet.

    http://hodinfo.com/forum/topics/smar...mment%3A138987

  9. #39
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    Sorry about linking to the thread instead of posting here. This site doesn't provide the writing features I need yet.
    So, I'm just going to port the blog entry over to this account to help spread the idea/word. Here is the link on these forums: http://www.hhoforums.com/entry.php?4...Controlled-PWM

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